Mersen DFC-12 200A Class J Safety Fuse

Product Description

The MERSEN DFC-12 is a 200-amp Class J safety fuse designed for overcurrent protection in industrial and commercial electrical distribution systems. Class J fuses are a current-limiting type, recognized for their fast-clearing characteristics and compact form factor that prevents substitution with lower-rated fuse classes. This fuse is installed by licensed electricians in panel boards, disconnect switches, and fused safety switches where reliable short-circuit and overload protection is required. At 200 amps, it suits branch-circuit and feeder applications in a range of demanding electrical environments.

The DFC-12 is suited for use in commercial and industrial installations where Class J fuse holders are specified. Typical applications include motor branch circuits, feeder protection, and equipment disconnect assemblies. It is appropriate for facilities requiring current-limiting overcurrent protection in compliance with NEC requirements for Class J fusing. Electricians working on panel upgrades, service replacements, or new construction installations will encounter this fuse rating in medium-load commercial systems.

Key Features

• 200-amp continuous current rating for feeder and branch-circuit protection
• Class J current-limiting design with fast-clearing action under fault conditions
• Compact Class J form factor prevents cross-installation with non-current-limiting fuse classes
• Suitable for use in listed Class J fuse holders and fused disconnect switches

Compatibility

Designed for use in Class J fuse holders and safety switches rated for 200-amp overcurrent protection devices.

Installation Notes

Installation should be performed by a licensed electrician in accordance with NEC Article 240 and any applicable local codes. Always de-energize and verify absence of voltage using a calibrated meter before servicing fuses or fuse holders. Use properly rated fuse pullers when removing or inserting Class J fuses — never handle them with bare hands while the circuit is live. Confirm the fuse holder is rated for Class J devices before installation.

Technical Specifications

• Amperage: 200 amps
• Fuse Class: Class J
• Type: Current-Limiting Safety Fuse
• UPC: 78200141882

Standard Information

• Brand: MERSEN
• Manufacturer Part Number: DFC-12